various: remove last remaining references to pkgs.xorg

pkgs/README.md

@@ -305,10 +305,6 @@ For example, the `libxml2` package builds both a library and some tools; but it
 
   - `servers/http` (e.g. `apache-httpd`)
 
-- **If it’s an implementation of the X Windowing System:**
-
-  - `servers/x11` (e.g. `xorg` — this includes the client libraries and programs)
-
 - **Else:**
 
   - `servers/misc`

pkgs/by-name/zo/zoom/package.nix

@@ -13,8 +13,6 @@
   libice,
 }:
 
-# !!! assert freetype == xorg.freetype
-
 stdenv.mkDerivation (finalAttrs: {
   pname = "zoom";
   version = "1.1.5";

pkgs/development/haskell-modules/make-package-set.nix

@@ -161,7 +161,7 @@ let
           inherit (scope) ghc buildHaskellPackages;
         };
     in
-    ps // ps.xorg // ps.gnome2 // { inherit stdenv; } // scopeSpliced;
+    ps // ps.gnome2 // { inherit stdenv; } // scopeSpliced;
   defaultScope = mkScope self;
   callPackage = drv: args: callPackageWithScope defaultScope drv args;